collega aree e circonferenze con i rispettvi raggi
| __ | 1. | 12,56 m2 | | A. | 12 cm | | __ | 2. | 19,625 dm2 | | B. | 30 cm | | __ | 3. | 62,8 dm | | C. | 25 cm | | __ | 4. | 69,08 dm | | D. | 3,2 dm | | __ | 5. | 200,96 cm | | E. | 2 m | | __ | 6. | 251,2 cm | | F. | 5 dm | | __ | 7. | 314 m | | G. | 100 cm | | __ | 8. | 452,16 cm2 | | H. | 1 dm | | __ | 9. | 628 cm | | I. | 40 cm | | __ | 10. | 2826 cm2 | | J. | 11 dm |
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